Domain Stay Prevents Login

Had issues registering a domain pointing to our server

e.g
Getting the webpage on my server http://xxx.xx.xxx.xx/abc/ to point to domain name
(To get the slash / etc I have to pay for premium forwarding.)

Domain Stay

Domain Stay Definition:
Domain stay retains your domain name in the address bar when visitors are looking at your site. In the example above if I pointed my website http://www.rapidtrade.biz/ to the website page on my server http://xxx.xx.xxx.xx/abc/, having domain stay active would ensure that http://www.rapidtrade.biz/ is shown in the address bar instead of the server path.

Issue: Domain Stay seems to prevent login to the site.

Status: Unresolved.
Notes: The probem may be .biz related
Will amend this post when answer is found